Structure and Luminescence Properties of Single-Phased BaCa2Y6O12:Eu3+, Dy3+

Single-phased Eu3+/Dy3+ activated BaCa2Y6O12 photoluminescence materials have been prepared via solid state reaction and their crystal structures and luminescent properties were investigated in detail. For prepared BaCa2Y6O12:Eu3+, the Eu3+ ion is identified occupying two different crystallographic sites, which can be excited selectively with different excitation wavelengths. Energy transfers between Dy3+ and from Dy3+ to Eu3+ are investigated. The overall emission color can be tuned from yellowish red to white light by adjusting the relative content between Eu3+ and Dy3+. Furthermore, the luminescence intensity of BaCa2Y6O12:0.03Eu3+, 0.09Dy3+ is 91% of the initial value at 623 K, which shows excellent thermal stability.